Malicious PDF — malware analysis report

Static analysis result for SHA-256 976f7a84da1fbdce…

MALICIOUS

PDF

75.7 KB Created: 2021-07-13 16:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cddbb6a272cc8247fac44303e4ed4e1a SHA-1: f4a5d82d7d1e2f362b714caa7fd0db14bf060571 SHA-256: 976f7a84da1fbdce9bc98b2204bcd19f0d5725a2ed6db7ce839a32f8ea6973f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links pointing to compromised websites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest the document's purpose is to facilitate the download or redirection to further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://burnettefamilyreunion2021.com/clients/867108/File/62853251689.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d5f66c135---98993529922.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dc8c1c5b4---tikelinekona.pdf
    • http://project-lovcen.me/userfiles/file/32704686736.pdf
    • http://mylodge-naoshima.com/80108429745.pdf
    • http://avanti-kuhni.ru/upload/files/xodug.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a526be34d75---47440287313.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c0812276104---mukujevibiravob.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd7e2b74e---22807383668.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/fc14e4c81a7d552e256037db3afde335/37701841615.pdf
    • http://gdbchurch.com/clients/43262/File/vubuvubujuwojitovozivuvo.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f190200143---48692948334.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d69d66ac9230936500a3d6f12ee83001/kelejifupuza.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6af9d13d5d---33602918343.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/75c4524cfae615668bb6c202210437dd/41154303043.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/35452223c3b4850cc54d1de516f92b66/35384774201.pdf
    • https://acrgroup.nl/userfiles/file/17233018133.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608493adcbd26---69193855555.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d1790ffbb---48172387359.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607120070e434---55700632684.pdf
    • http://dagmar-e.de/userfiles/file/6018847432.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072659cc207e---muwumewizojitobodorolexi.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607791ee900fc---51094365715.pdf
    • http://garderoba.sk/images/_file/rinobugedomidewojupe.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608173c749b19---38061814889.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=identical+meaning+in+bengali
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c391.bin
08c6e9db5bc0cc96126a682ae1be0ec0c0f3bd4bab0492d4c6021b1e57db6549
pdf-font-stream PDF embedded font (sfnt) at offset 0xC391 16816 bytes
font_01_sfnt_off0000ef5e.bin
00a1a2fc26504ddf4d85850a7e9f37a4e868bb398c79c470527872c27c7aadb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 10416 bytes
font_02_sfnt_off000106b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B4 16792 bytes